加载nbd（网络块设备: Network Block Device）模块

sudo lsmod |grep nbd
sudo modprobe nbd max_part=8

连接 qemu-nbd

sudo qemu-nbd --connect=/dev/nbd0 /path/to/image.qcow2

查看分区信息

$ sudo fdisk -l /dev/nbd0
Disk /dev/nbd0: 200 GiB, 214748364800 bytes, 419430400 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: gpt
Disk identifier: 21A2186E

Device      Start       End   Sectors  Size Type
/dev/nbd0p1    34     32767     32734   16M Microsoft reserved
/dev/nbd0p2 32768 419426303 419393536  200G Microsoft basic data

挂载分区

sudo mount /dev/nbd0p2 qcow2_mount_point

卸载分区和断开连接

sudo umount qcow2_mount_point
sudo qemu-nbd --disconnect /dev/nbd0
sudo rmmod nbd